Process of making bricks



Feb. 28, 1933. F M MILLER- ggy'g PROCESS OF MAKING BRICKS Filed March 24, 1931,

Patented Feb. 28, 1933 UNITED vs'lA'rEs FRED MILL-ER, OF BALA, PENNSYLVANIA Y PROCESS OF MAKING BRICKS i Application led March 24, 1931. Serial No. 524,866.

The object of my invention is a means for supporting the column of refractory clay from which refractory shapes are formed as the column is forced out of an extrusion press. My novel means for this purpose consists of a column of refractory material having one face of suitable shape to support the column of refractory material and having its bottom face flat to lie on an 0E bearing belt.

Another feature of my invention is a'die for an extrusion press, said die being adapted to produce a column of refractory material and a supporting column therefor. T his die has two apertures therein. One of these apertures is of suitable shape to form the column of refractory material which may then be cut into bricks of the desired shape. The other aperture is of suitable shape to form the supporting column.

For a further exposition of my invention reference may be had to the annexed drawing and specification at the end whereof my invention will be specifically pointed ou and claimed.

In the drawing,

Figure 1 is a plan view of my device with the return belt omitted.

Figure 2 is a side elevation of my device.v

Figure 3 is a diagrammatic view showing the die in vertical cross section withparts of the column broken away.

Figure 4 is a front elevation of the die shown in Figure 3.

Figure 5 is a front elevation of a modified form of die.

In the drawing my invention is shown as applied to and performed in apparatus which are at present standard. The drawing shows an extrusion press generally indicated at 1 which may be of any standard type. Press 1 has a hopper having an opening 2 therein through which fresh material and returned material is fed to the press. Press 1 has at its outlet end a die 3. Opposite to and adjacent die 3 the device is provided with an ofi' bearing belt 4 which conveys the column of refractory extruded from the press to the cutting mechanism, generally indicated at 5. From the cutting mechanism there leads-0H a belt 6. My device is also provided with a return belt 7 upon which material is returnedto hopper 2.

As is best seen in Figure 4 die 3 has an aperture 10- therein. This aperture is of 55 suitable shape to produce a column of clay or refractory material of thev desired `cross section of the'finished brick or checker shape having laterally and downwardly extending ribs. `These bricks or checker shapes are formed from the column by being cut in suitable lengths by the cutting mechanism 5. Die 3 also has an aperture 11 therein.v The aperture 11 is of suitable shape to produce a column for supporting the column from which the bricks are made. Such a column has on its upper surface a face adapted to cooperate with and support the columnfrom which the bricks are made and it also has on its lower face a flat surface adapted to lie fiat on and cooperate with belts 4 and 6. The aperture 11 may be sloped upward as shown in Figure 3 or may be horizontal or parallel to aperture 10. I

As seen in Figure 3, the refractory material which` is extruded from press 1 through aperture 10 forms a column 100 having the shape of the aperture 10 and the clay which is extruded through aperture 11 forms a vcolumn 111 having the shapel of aperture 80 11. When press 1 is first started up the column 111 is lifted or bent slightly upward and placed upon the belt 4 to support the column 100 on the belt 4.

Figure 5 shows a modified form of die 33 85 having an aperture 210 therein adapted to produce a column of refractory material from which bricks having a shape of a cross section of the column may be cut. Die 33 also has an aperture 211 through which is extruded a column of refractory material having on its upper surface a suitable face for supporting the column extruded through aperture 210. y

I do not intend to be limited in the practice of my invention save as the scope of the prior art and of the attached claims may require. y

I claim:

1. The method of making bricks having in cross section laterally and downwardly extending ribs, which process consists in making two superposed, spaced columns of clay, of which one is of the cross section recited and of which the other is in cross section the complement of the lower part of the rst column to support the ribs of the same,

by eXtruding clay through two superposed, n

' spaced dies conforming in contour to the cross sections of the respective columns.

2. The method of making brickshaving in f cross section laterally and downwardly eX- tending ribs, which process consists in making two superposed, spaced columns of clay,

of which one 1s of the cross section recited and of which the second is in cross section, the complement of the lower part of the rst column to support the ribs of the same, by extruding clay through two superposed, spaced dies, conforming respectively in contour to the cross sections of the respective columns, supporting the downwardly and -i laterally extending ribs of the rst column by lifting and guiding the second columnto position for contacting with andcarrying the lirst column without distortion of its ribs, recovering the iirst column and discarding the second column by feeding both col` umns in the position described on a carrier belt to a cutter, recovering the bricks cut from the first column and returning the cut portions of the second column for further extrusion.

FRED M. MILLER. 

